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Benchmarks and sediment source(s) of the 1755 Lisbon tsunami deposit at Boca do Rio Estuary

2013-09Journal article Restricted access
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dc.contributor.authorFont, Eric
dc.contributor.authorVeiga-Pires, C.
dc.contributor.authorPozo, Manuel
dc.contributor.authorNave, Silvia
dc.contributor.authorCostas, Susana
dc.contributor.authorRuiz, F.
dc.contributor.authorAbad, Manuel
dc.contributor.authorSimões, Nuno
dc.contributor.authorDuarte, Sílvia
dc.contributor.authorRodriguez-Vidal, J.
dc.date.accessioned2013-07-26T10:41:54Z
dc.date.available2013-07-26T10:41:54Z
dc.date.issued2013-09
dc.date.updated2013-07-18T21:45:37Z
dc.description.abstractStandardizing the signature of tsunami deposits has been identified as a major limitation for the identification of paleo-tsunami deposits. This limitation mostly arises from the strongly source-dependent nature of these deposits, which in turn determines their composition and depositional architecture, and from the effect of the local morphology of the corresponding depositional environment. Here, we provide new highresolution mineralogical, geochemical and micro/macrofauna data of the 1755 tsunami layer of Boca do Rio estuary (Algarve, Portugal) with the aim of unraveling the signatures of estuarine tsunami deposits and linking them to possible sediment sources. We also apply for the first time diffuse reflectance spectrophotometry (DRS) analysis. Our results show that the 1755 tsunami deposit of the Boca do Rio estuary is featured by an enhancement in Sr and Ca, which are linked to the input of biogenic and detrital carbonates (shell fragments and limestone clasts) from the beach foreshore and a strong depletion in most terrestrial- and marine-sensitive indicators. The latter is interpreted as resulting from the reworking of the estuarine clays and subsequent dilution within a huge volume of sand eroded from the coastal barrier. It confirms that in the case of the Boca do Rio estuary, the sediment source is essentially proximal and coastal. Textural and mineralogical features between the base and the top of the tsunami layer suggest the imprint of run-up and backwash currents derived from a unique wave. Micro and macrofauna analysis and DRS data of the siliciclastic fraction show slight but significant environmental changes occurring just after the tsunami, which could be provoked by an eventual closure of the estuary mouth.por
dc.identifier.citationFont, Eric; Veiga-pires, Cristina; Pozo, Manuel; Nave, Sílvia; Costas, Susana; Ruiz Muñoz, Francisco; Abad, Manuel; Simões, Nuno; Duarte, Sílvia; Rodríguez-Vidal, Joaquín. Benchmarks and sediment source(s) of the 1755 Lisbon tsunami deposit at Boca do Rio Estuary, Marine Geology, 343, 1-14, 2013.por
dc.identifier.issn00253227
dc.identifier.otherAUT: CVP01371
dc.identifier.urihttp://hdl.handle.net/10400.1/2821
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.subjectTsunami depositpor
dc.subjectEstuarypor
dc.subjectGeochemical proxiespor
dc.subjectMineralogypor
dc.subjectHydrodynamicspor
dc.titleBenchmarks and sediment source(s) of the 1755 Lisbon tsunami deposit at Boca do Rio Estuarypor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage14por
oaire.citation.startPage1por
oaire.citation.titleMarine Geologypor
oaire.citation.volume343por
person.familyNameVeiga-Pires
person.familyNameCostas
person.givenNameCristina
person.givenNameSusana
person.identifier113325
person.identifier1448818
person.identifier.ciencia-id4A1F-CEDA-E66C
person.identifier.ciencia-idAF19-9EEE-7550
person.identifier.orcid0000-0002-9323-0723
person.identifier.orcid0000-0002-4005-077X
person.identifier.ridB-5144-2008
person.identifier.scopus-author-id7801372905
person.identifier.scopus-author-id9043656500
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationd1541efa-0eaa-48dc-aea3-a1e64aa0065a
relation.isAuthorOfPublication62d73183-10ba-42ca-80a7-458c42d1375b
relation.isAuthorOfPublication.latestForDiscoveryd1541efa-0eaa-48dc-aea3-a1e64aa0065a

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